libstdc++
strstream
1 // Backward-compat support -*- C++ -*-
2 
3 // Copyright (C) 2001, 2002, 2004, 2005, 2009, 2010
4 // Free Software Foundation, Inc.
5 //
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
10 // any later version.
11 
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16 
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
20 
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
25 
26 /*
27  * Copyright (c) 1998
28  * Silicon Graphics Computer Systems, Inc.
29  *
30  * Permission to use, copy, modify, distribute and sell this software
31  * and its documentation for any purpose is hereby granted without fee,
32  * provided that the above copyright notice appear in all copies and
33  * that both that copyright notice and this permission notice appear
34  * in supporting documentation. Silicon Graphics makes no
35  * representations about the suitability of this software for any
36  * purpose. It is provided "as is" without express or implied warranty.
37  */
38 
39 // WARNING: The classes defined in this header are DEPRECATED. This
40 // header is defined in section D.7.1 of the C++ standard, and it
41 // MAY BE REMOVED in a future standard revision. One should use the
42 // header <sstream> instead.
43 
44 #ifndef _BACKWARD_STRSTREAM
45 #define _BACKWARD_STRSTREAM
46 
47 #include "backward_warning.h"
48 #include <iosfwd>
49 #include <ios>
50 #include <istream>
51 #include <ostream>
52 #include <string>
53 
54 _GLIBCXX_BEGIN_NAMESPACE(std)
55 
56  // Class strstreambuf, a streambuf class that manages an array of char.
57  // Note that this class is not a template.
58  class strstreambuf : public basic_streambuf<char, char_traits<char> >
59  {
60  public:
61  // Types.
62  typedef char_traits<char> _Traits;
63  typedef basic_streambuf<char, _Traits> _Base;
64 
65  public:
66  // Constructor, destructor
67  explicit strstreambuf(streamsize __initial_capacity = 0);
68  strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));
69 
70  strstreambuf(char* __get, streamsize __n, char* __put = 0);
71  strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0);
72  strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0);
73 
74  strstreambuf(const char* __get, streamsize __n);
75  strstreambuf(const signed char* __get, streamsize __n);
76  strstreambuf(const unsigned char* __get, streamsize __n);
77 
78  virtual ~strstreambuf();
79 
80  public:
81  void freeze(bool = true);
82  char* str();
83  int pcount() const;
84 
85  protected:
86  virtual int_type overflow(int_type __c = _Traits::eof());
87  virtual int_type pbackfail(int_type __c = _Traits::eof());
88  virtual int_type underflow();
89  virtual _Base* setbuf(char* __buf, streamsize __n);
90  virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
91  ios_base::openmode __mode
92  = ios_base::in | ios_base::out);
93  virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
94  = ios_base::in | ios_base::out);
95 
96  private:
97  strstreambuf&
98  operator=(const strstreambuf&);
99 
100  strstreambuf(const strstreambuf&);
101 
102  // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
103  char* _M_alloc(size_t);
104  void _M_free(char*);
105 
106  // Helper function used in constructors.
107  void _M_setup(char* __get, char* __put, streamsize __n);
108 
109  private:
110  // Data members.
111  void* (*_M_alloc_fun)(size_t);
112  void (*_M_free_fun)(void*);
113 
114  bool _M_dynamic : 1;
115  bool _M_frozen : 1;
116  bool _M_constant : 1;
117  };
118 
119  // Class istrstream, an istream that manages a strstreambuf.
120  class istrstream : public basic_istream<char>
121  {
122  public:
123  explicit istrstream(char*);
124  explicit istrstream(const char*);
125  istrstream(char* , streamsize);
126  istrstream(const char*, streamsize);
127  virtual ~istrstream();
128 
129  strstreambuf* rdbuf() const;
130  char* str();
131 
132  private:
133  strstreambuf _M_buf;
134  };
135 
136  // Class ostrstream
137  class ostrstream : public basic_ostream<char>
138  {
139  public:
140  ostrstream();
141  ostrstream(char*, int, ios_base::openmode = ios_base::out);
142  virtual ~ostrstream();
143 
144  strstreambuf* rdbuf() const;
145  void freeze(bool = true);
146  char* str();
147  int pcount() const;
148 
149  private:
150  strstreambuf _M_buf;
151  };
152 
153  // Class strstream
154  class strstream : public basic_iostream<char>
155  {
156  public:
157  typedef char char_type;
158  typedef char_traits<char>::int_type int_type;
159  typedef char_traits<char>::pos_type pos_type;
160  typedef char_traits<char>::off_type off_type;
161 
162  strstream();
163  strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
164  virtual ~strstream();
165 
166  strstreambuf* rdbuf() const;
167  void freeze(bool = true);
168  int pcount() const;
169  char* str();
170 
171  private:
172  strstreambuf _M_buf;
173  };
174 
175 _GLIBCXX_END_NAMESPACE
176 
177 #endif